Safety-valve for gas-conduits.



10.877,003. y PATENTEDJAN.21,1908. W. SGHULZB.-

SAFETY VALVE FOR GAS CONDUITS.

APPLIOATION FILED 00T'. '1. 19o?.

uuuuuuuull/,s//gJD/f/@luunm WILHELM SCHULZE, OF DETMOLD, GERMANY.

SAFETY-VALVE FOR GAS-CONDUITS.

Specification of Letters Patent.

Patented Jan. 21, 1908.

Application filed October 7. 1907I Serial No. 396.272.

To all whom t may concern:

Be it known that I, WILHELM Soi-IULZE,

i engineer, a subject of the German Emperor,

residing at Detmold, German Empire, have invented a new and usefulSafety-Valve for Gas-Conduits, of which the following is aspecification.

Reference is to be had to the accompanying drawing, in which Figure 1 isa longitudinal section of the safety valve, Fig'. 2 is a section on line2-2 of Fig. 1, and Fig. 3 a section on line 3 3 of Fig. 1.

It occurs with all gas-conduits that the supply is interrupted by onecause or another, and that the gas of a whole town is suddenly put out.When the gas is turned on again, it may easily happen that the same isnot turned off or relighted at some place of consumption or another, sothat it streams out without being burned, and may cause poisonings andexplosions. This danger is prevented by the valve hereinafter described.

The valve-chamber is preferably made of brass. ln the upper cylindricalpart of the chamber is arranged a horse shoe-magnet a in such a positionover the seat of the iron valve b thatpthe valve is just then in itsclosing position when it is attracted by the magnet. The valve-plate iscarried by a diaphragm c similar to those used in dry gasmeters.

The diaphragm is held between two sheetv metal plates and carries at thetop a short tube which is sufficiently wide to allow, the pin carryingthe valve-plate to move in it. The upper side of the diaphragm is underthe pressure of the gas in the conduit. On the under side of thediaphragm there is a spring, 1 and the air can freely enter and pass outthrough a suflicient number of openings.

' In the casing the upper cylindrical part is likewise closed bydiaphragm of'. The pin e on the other side of this diaphragm hassufficient free play for the air to enter and pass out of the part ofthe casing above the diaphragm d. The horse-shoe magnet is held in itsposition by a screw i. The valve-disk l) is guided by three ribs c.

The operation of the valve is as follows: When it is open, the gaspasses freely through it. lf any disorder occurs in the conduit, the gaspressure suddenly ceases and the flames become extinct. The pressure onthe upper side of the diaphragm ceases, while on the other side thepressure of the spring 1 prevails and the diaphragm with the valve bmoves towards the seat, of said valve. The spring 1 can be accuratelyadjusted by means of the screw When the disturbance in the gas supply isremoved, the gas presses back the diaphragm c but the iron valve-disk t,held by the magnet a, remains on its seat and prevents the gas frompassing through. In order to open the valve it is necessary to pressdown the pin e. y The pressure'is transmitted by the rod g to thevalve-disk, b it draws it off from the magnet and brings it back to thediaphragm. rl`he rod g can freely move in a tube h on the valvedisk. lfthe pressure on the pressing pin ceases, the rod, together with thepressing pin, is raised again by the spring m. If the gas is on againthe valve remains open, otherwise it closes again automatically.

Claim.

ln a safety valve for gas conduits the combination with a casing ofnon-magnetic material and provided with conduits for the passage of thegas, of a valve seat arranged between said conduits, a valve of magneticmaterial iitting on to the seat, a diaphragm arranged below the valveseat and being loosely in contact with the stem of the valve, a magnetarranged above the valve, a diaphragm in the upper part of the casing, apin contacting with the diaphragm and eXe tending above the casing anda'spring being in contact with a rigid part of the casing and theunderside of the upper diaphragm.

In witness whereof l have signed this speciication in the presence oftwo witnesses.

WILHELM SCHULZE.

Witnesses: v

ROBERT v. BLow, T. A. WEssEL.

